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384.5 M

Domains known to webXtrend

9.4 M

New domains in the last 30 days

62.6 M

Social media profiles detected

commonknowledge.app

Get an email when its DNS, website or certificate changes.

commonknowledge.app serves a website of its own over HTTPS. It answers on both IPv4 and IPv6, with a valid TLS certificate and MX records for mail.

3,349 other domains share an IP address with it.

The most recent crawl returned the page title “Common Knowledge” and 413 bytes of HTML.

Domain properties

Property Value Explanation
Top-level domain .app Statistics for all domains we know under this TLD.
Has website yes A website is hosted under the domain, which does not redirect to an external domain.
Has MX-record yes The domain has an MX record.
External redirect no The domain redirects to another domain.
Redirect to https yes The domain redirects to https.
Redirect to www. no The domain redirects to www.domain.
Only with www. no The domain can only be reached with the subdomain "www".
Only DNS, no website no There are no A or AAAA records in DNS.
IP-Address Both Shows whether the domain only has IPv4 or IPv6 or both.
SSL-Certificate valid Shows whether the domain has a valid SSL certificate.
Redirects 0 Number of domains that redirect to this domain.
Reverse IP 3,349 Number of domains with the same IP(s).

This data through the API

The data on this page is also available as JSON: /lookup for the key facts, /reverseip, /redirect and /similar for the lists, and /dnshistory with Basic and Premium. A free account comes with an API key and 100 calls a day.

curl -X POST https://api.webxtrend.com/v1.0/lookup \
  -H 'Content-Type: application/json' \
  -d '{"token": "YOUR_TOKEN", "query": "commonknowledge.app"}'

Create a free account Read the API docs

Detected social media networks

No social networks found on this website.

Similar websites

Website Similarity
Knowledge
86 %
Knowledge
86 %
Common Knowledge Eats
Explore culinary knowledge through engaging recipes at common knowledge eats. Join our community for food blogging and recipe sharing.
81 %
KnowledgeContainer
80 %
The Knowledge
The Knowledge sheet
80 %
KnowledgeContainer
80 %
Collective Knowledge
78 %
KnowledgeLayer
78 %
Knowledge is Knowledge
78 %
Enterprise Planning, BI & AI Systems ยท KnowledgeSeed
KnowledgeSeed designs and builds enterprise planning, business intelligence, and AI systems for companies where good enough isn't good enough.
78 %
Knowledge Companion
78 %
KnowledgeLayer
78 %
Image Knowledge
77 %
Knowledge Base
76 %
Knowledge Base
76 %
Knowledge Base
76 %
Knowledge Base
76 %
Knowledgestreet
76 %
Knowledge Base
76 %
Knowledge Base
76 %

Websites whose start page offers something similar, found by comparing the text of their start pages, across languages. Near-identical copies, parking pages and error pages are left out. The full list of up to 100 comes through the API: similar websites.

Last SSL certificate

Issuer Google Trust Services
Valid from 8/5/2026
Valid to 11/3/2026
Time until expiry 14 days

Last successful crawl

Title Common Knowledge
Description (not set)
Content-Length 413 bytes

Title and description as published by the page itself in its own <title> and <meta name="description"> tags.

DNS history

IPv4 address Last updated
104.21.18.174 10/18/2025
172.67.182.207 10/18/2025
IPv6 address Last updated
2606:4700:3031:0:0:0:6815:12ae 7/1/2026
2606:4700:3033:0:0:0:ac43:b6cf 7/1/2026
2606:4700:3030:0:0:0:6815:12ae 10/18/2025
2606:4700:3030:0:0:0:ac43:b6cf 10/18/2025
Mail server Priority Last updated
route3.mx.cloudflare.net 2 10/13/2025
route1.mx.cloudflare.net 59 10/13/2025
route2.mx.cloudflare.net 66 10/13/2025
Name server Last updated
alan.ns.cloudflare.com 10/13/2025
eva.ns.cloudflare.com 10/13/2025

The five most recent states of each record type. The full history comes through the API: DNS history.

Most recent redirect domains

No domains found.

Reverse IP neighbours

104.21.18.174 841 domains · here since 9/16/2026
Domain On this IP since
zx9999.org 9/26/2026
zvelta.com.ua 10/17/2026
zorafiles.site 9/13/2026
zhong365.com 9/14/2026
zhaofeizi61.com 9/19/2026
zent-cloudx.site 9/28/2026
zeetee.info 9/15/2026
ypac.org 9/14/2026
youown.net.nz 10/15/2026
yoro.cyou 9/13/2026
ym77.app 9/19/2026
yeg5325.cc 10/9/2026
and 828 more
172.67.182.207 840 domains · here since 9/16/2026
Domain On this IP since
zx9999.org 9/26/2026
zvelta.com.ua 10/17/2026
zorafiles.site 9/13/2026
zhong365.com 9/14/2026
zhaofeizi61.com 9/19/2026
zent-cloudx.site 9/28/2026
zeetee.info 9/15/2026
ypac.org 9/14/2026
youown.net.nz 10/15/2026
yoro.cyou 9/13/2026
ym77.app 9/19/2026
yeg5325.cc 10/9/2026
and 827 more
2606:4700:3031::6815:12ae 834 domains · here since 9/16/2026
Domain On this IP since
zx9999.org 9/26/2026
zvelta.com.ua 10/17/2026
zorafiles.site 9/13/2026
zonking.cn 10/1/2026
zhong365.com 9/14/2026
zhaofeizi61.com 9/19/2026
zent-cloudx.site 9/28/2026
zeetee.info 9/15/2026
ypac.org 9/14/2026
youown.net.nz 10/15/2026
yoro.cyou 9/13/2026
ym77.app 9/19/2026
and 821 more
2606:4700:3033::ac43:b6cf 834 domains · here since 9/16/2026
Domain On this IP since
zx9999.org 9/26/2026
zvelta.com.ua 10/17/2026
zorafiles.site 9/13/2026
zonking.cn 10/1/2026
zhong365.com 9/14/2026
zhaofeizi61.com 9/19/2026
zent-cloudx.site 9/28/2026
zeetee.info 9/15/2026
ypac.org 9/14/2026
youown.net.nz 10/15/2026
yoro.cyou 9/13/2026
ym77.app 9/19/2026
and 821 more

Sharing an address does not always mean sharing a server: on a CDN or a large hosting platform, millions of unrelated domains answer on the same few addresses. We measured how far that goes in Half the web sits on 276 IP addresses. The complete list of neighbours, also for an IP address, comes through the API: reverse IP lookup.